Eucalliaxiopsis panglaoensis ( Dworschak, 2006 )

Poore, Gary, 2021, Indo-West Pacific and Australian species of Eucalliacidae with descriptions of four new species (Crustacea: Axiidea), Memoirs of Museum Victoria 80, pp. 1-41 : 28

Eucalliaxiopsis panglaoensis ( Dworschak, 2006)

Figure 25g

Eucalliax panglaoensis Dworschak, 2006: 349–358 , figs 1–4, 6, 7 (not fig. 5 = E. dworschaki sp. nov.).— Osawa and Fujita, 2016: 40–41, fig. 3c.— Dworschak, 2018: 17, fig. 1 (partim).

Calliaxina panglaoensis .— Sakai, 2011: 501.

Eucalliaxiopsis panglaoensis .— Poore et al., 2019: 125, 127, 146, fig. 19m. — Robles et al., 2020.

Material examined. Paratypes. Philippines, Panglao Island , 09° 38.3'S, 123° 49.6' E, MNHN Th1503 (female, 7.1 mm), MNHN Th1504 (male, 4.3 mm) .

Diagnosis. Pleonite 1 with pleopods attached to pair of sternal plates. Eyestalk about twice as long as wide. Antennule peduncle reaching to midpoint of antenna peduncle article 5. Maxilliped 3 exopod absent. Cheliped carpi distolateral margin with 3 acute teeth near lower margin separated by wide grooves parallel to lower margin, second tooth with acute ridge, propodi lateral face without longitudinal ridge, upper mesial face with row of clusters of long setae. Male pleopod 1 article 1 linear, with distal setae; article 2 blade-like with subapical medial notch. Female pleopod 2, appendix interna absent. Uropod endopod ovate with excavate apex. Telson with row of spiniform setae on ridge.

Distribution. Philippines, Panglao; Japan, Ryukus, Miyako Group. Sandy beaches, intertidal to 4 m.

Remarks. Eucalliaxiopsis panglaoensis differs from E.paradoxa and E. dworschaki (see remarks under Eucalliaxiopsis above and these two species) in armature of the cheliped. The marginal teeth at the lower distal angle of the carpus are more widely spaced, and the second more sharply ridged than in the other two. The longitudinal lateral ridge on the propodus is shorter than in E. dworschaki but more prominent than in E. paradoxa (fig. 25g; Dworschak, 2006).

The record of this species, rather than E. dworschaki , from Japan is based on the illustration of the cheliped with a short lateral propodal ridge ( Osawa and Fujita, 2016: fig. 3c).

Figures

Figure 25. Eucalliaxiopsis spp. E. aequimana: a, b, major cheliped, mesial. E. dworschaki, Papua New Guinea, MNHN-IU-2013-10003: c, d, major cheliped lateral, upper margin. E. dworschaki, Philippines, NHMW 20923: e, f, major cheliped carpus lower lateral angle, upper margin. E. panglaoensis, NHMW 20922: g, minor cheliped, lateral. E. inaequimana: h, major cheliped, mesial. E. paradoxa: h, i, major cheliped lateral, mesial. Photos e–g: P.C. Dworschak. Various scales.